BINLUN Men's Black Ceramic Waterproof Quartz Couple Watches His and Hers Gift ?Movement?imported Japanese quartz movement ?Scratch resistant?synthetic sapphire crystal, black ceramic case and band ?Waterproof?water resistant to 30m (98ft): withstands rain and splashes of water, but no shower ?Features?calendar day date, tachymeter, luminous hands, unique big face, hidden push button clasp, 3-hand analog ?Specification? case diameter:1.57in (40mm), case thickness:0.41 in (10.5mm), band width:0.79in (20mm), valid band diameter:7.87 in (20cm).